[Feature] Ability to cancel running job from Paimon WebUI

[gmdfalk]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

Hey, this is related to this issue which i've experienced too: #538

If a job is submitted through Paimon WebUI and it doesn't return results, this Paimon WebUI tab will hang indefinitely, waiting for results.

Solution

It would be great if we can cancel the job submitted and/or get a bit more info on its status.

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[hiliuxg]

#546 @gmdfalk